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 to save his life. This event is called by his followers Hegira, or the Flight: it occurred in the 622d year of the Christian era; and they reckon dates from it as we do from the birth of Christ. Mohammed took refuge in the city of Medina, and by the aid of his disciples there, he was soon able to return to Mecca at the head of an armed force. This enabled him to subdue those who would not be convinced; and henceforward he proceeded to make proselytes and subjects together, till at length, being master of all Arabia and of Syria, his numerous followers saluted him king (627). This extraordinary man died suddenly, and in the midst of successes, at the age of sixty-one (632). Abubeker, his father-in-law and successor, united and published the books of the Koran, and continued and extended the empire which Mohammed had left him.

A more powerful caliph (such was the title given to this series of monarchs) was Omar, the successor of Abubeker (635). Barbarity, ferocity, and superstition seem to have been mingled and to have reached their height in the person of Omar. It was by his order that the most magnificent library of antiquity, that of Alexandria, consisting of 700,000 volumes, was burned to ashes. The reason which he gave for this act is worth preserving:—'If these writings,' he said, 'agree with the Koran, they are useless, and need not be preserved; if they disagree, they are pernicious, and ought to be destroyed.' By himself and his generals this ferocious conqueror added Syria, Ph[oe]nicia, Mesopotamia, Chaldea, Egypt, Lybia, and Numidia, to his empire. Next came Otman, and then Ali, the son-in-law of Mohammed himself. The name of Ali is still revered by Mussulmans. His reign was short, but glorious. 'After some internal troubles,' says Hallam, 'the Saracens won their way along the coast of Africa, as far as the pillars of Hercules, and a third province was irretrievably torn from the Greek empire. These Western conquests introduced them to fresh enemies, and ushered in more splendid successes. Encouraged by the disunion of the Visigoths [in Spain], and invited by treachery, Muza, the general of a master who sat beyond the opposite extremity of the Mediterranean Sea, passed over into Spain, and within about two years the name of Mohammed was invoked under the Pyrenees.'

Nineteen caliphs of the race of Omar succeeded Ali, and after these came the dynasty of the Abassydæ, descended by the male line from Mohammed. The second caliph of this race, named Almanzor, removed the seat of empire to Bagdad (762), and introduced learning and the culture of the sciences, which his successors continued to promote with zeal and liberality. This was some recompense for those indignities which had been cast upon literature by the brutal Omar. Perhaps the obligations of modern Europe to Arabia at this time have been overstated; but it is not to be denied that learning, almost totally excluded and extinct in Europe during the eight and ninth centuries, found an asylum here. It has been matter of dispute how the tastes of these fierce Arabians became thus first directed. They probably owed it to the Greeks; but it is certain that what they got they returned with interest. We are said to derive our present arithmetical figures from this strange people; and geometry, astronomy, and alchemy were their favorite pursuits. The graces of light literature were not neglected, as is shown by the One Thousand and One Nights' Entertainments, a production of this period, which still continues to solace the hours of childhood and old age among ourselves, and attests the extent